1931990119 has 2 divisors, whose sum is σ = 1931990120. Its totient is φ = 1931990118.

The previous prime is 1931990077. The next prime is 1931990147. The reversal of 1931990119 is 9110991391.

It is a strong prime.

It is an emirp because it is prime and its reverse (9110991391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1931990119 - 2⁷ = 1931989991 is a prime.

It is a super-2 number, since 2×1931990119² = 7465171639827268322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1931990149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965995059 + 965995060.

It is an arithmetic number, because the mean of its divisors is an integer number (965995060).

Almost surely, 2^1931990119 is an apocalyptic number.

1931990119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931990119 is an equidigital number, since it uses as much as digits as its factorization.

1931990119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 43.

The square root of 1931990119 is about 43954.4095512612. The cubic root of 1931990119 is about 1245.4748636672.

The spelling of 1931990119 in words is "one billion, nine hundred thirty-one million, nine hundred ninety thousand, one hundred nineteen".